linux-kernel - Re: [PATCH net] lan966x: Fix unloading/loading of the driver

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Message-Id: <168484921912.23799.4816780617642499694.git-patchwork-notify@kernel.org>
Date:   Tue, 23 May 2023 13:40:19 +0000
From:   patchwork-bot+netdevbpf@...nel.org
To:     Horatiu Vultur <horatiu.vultur@...rochip.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, UNGLinuxDriver@...rochip.com
Subject: Re: [PATCH net] lan966x: Fix unloading/loading of the driver

Hello:

This patch was applied to netdev/net.git (main)
by Paolo Abeni <pabeni@...hat.com>:

On Mon, 22 May 2023 14:00:38 +0200 you wrote:
> It was noticing that after a while when unloading/loading the driver and
> sending traffic through the switch, it would stop working. It would stop
> forwarding any traffic and the only way to get out of this was to do a
> power cycle of the board. The root cause seems to be that the switch
> core is initialized twice. Apparently initializing twice the switch core
> disturbs the pointers in the queue systems in the HW, so after a while
> it would stop sending the traffic.
> Unfortunetly, it is not possible to use a reset of the switch here,
> because the reset line is connected to multiple devices like MDIO,
> SGPIO, FAN, etc. So then all the devices will get reseted when the
> network driver will be loaded.
> So the fix is to check if the core is initialized already and if that is
> the case don't initialize it again.
> 
> [...]

Here is the summary with links:
  - [net] lan966x: Fix unloading/loading of the driver
    https://git.kernel.org/netdev/net/c/600761245952

You are awesome, thank you!
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